@ Asyn Thanks very much for reporting!
I don't have much hope though...
...I've already trawled through the Avast 17 Beta threads and several mentions that new Avast 17 UI would be 'too long for small screens' (e.g. Netbooks with max 600 pixel screen height) during Beta testing of various Release Candidates... so IMHO Devs have had plenty of forewarning and deliberately chosen to ignore those of us with small screen?
I guess AVAST no longer want Netbook owners to use their product for some unfathomable reason? Pity.